Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ddb774d04d4b5f…

MALICIOUS

PDF

88.7 KB Created: 2021-04-03 01:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9532fd964afb3778c6ab90c972541076 SHA-1: 109e73e106d25d14c7e1f1b11eb0cc541bc686fe SHA-256: 32ddb774d04d4b5f8543a15c1adb42ef83184b74dfd55e10a5dbcb69aa775dab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/strik?utm_term=think+of+me+karaoke+version PDF link annotation
    • https://cdn.sqhk.co/kujotukil/gihgfje/71702541332.pdfIn PDF document text
    • https://cdn.sqhk.co/fotinegataso/arPjjOo/electron_configuration_for_oxygen_atomic_number_8.pdfIn PDF document text
    • http://new-volosi.ru/how_to_set_skmei_digital_watch_timezxcco.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/hcQgchh/yelp_business_contact_phone_number.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/principles_of_marketing_kotler_and_aps3m4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_60216c7421404.pdfIn PDF document text
    • http://befigter.xyz/honda_civic_service_manual_2018k54jr.pdfIn PDF document text
    • http://nujosanoze.iblogger.org/97460590561.pdfIn PDF document text
    • http://jomufobi.iblogger.org/69016478102.pdfIn PDF document text
    • http://makamar.tech/bourgeois_gentilhomme_analysekej58.pdfIn PDF document text
    • http://card2card-perevod24.site/58801932707u8z7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384484/normal_5fccbf61c6a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_601ef17c73323.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/pCvighh/zabozewiniditolupiluva.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/qpZghtV/sazusukoxabowegerig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_600b6e6556f2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasazaxara.rf.gd/19515948000.pdfIn PDF document text
    • http://luwidegudaje.epizy.com/banking_practice_questions.pdfIn PDF document text
    • http://fevidubigozexa.rf.gd/gajexexunivixepenesadat.pdfIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_58ce80d0c4be4d439da6c123e5bc4c06.pdf?index=trueIn PDF document text
    • http://zakivijojinikij.epizy.com/aulas_de_violo_para_iniciantes.pdfIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_9873f906e41e4f348f45c0efc146244e.pdf?index=trueIn PDF document text
    • https://721ea522-a1f6-4523-903e-24b3c8014629.filesusr.com/ugd/5a834c_aedb7248f8304a41b99282b9db9c2496.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_f5765e78e6bb49e787740f230bb37742.pdf?index=trueIn PDF document text
    • http://tiliwadovi.epizy.com/pajupubizomonafo.pdfIn PDF document text
    • http://garopawugalil.rf.gd/68773669994.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_4aa91783adb4479e9515b9d031ed791d.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E30 5048 bytes
SHA-256: a0125b0b8e95bbe0237a398aa352caa8c439c09c89ba5121cc0effa6fa3e7cf4
font_01_sfnt_off00012f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F30 11000 bytes
SHA-256: 78d8e38241d3376804a08cc923fca059c917960577b07c35d5537ebba2ad8a98